The Tension and Puncture Properties of HDPE Geomembrane under the Corrosion of Leachate
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Materials
2.1.1. HDFE Geomembrane
Parameters | Thickness | Density | Tensile strength (crossbar) | Elongation at break (crossbar) |
---|---|---|---|---|
HDPE geomembrane | 1 mm | 0.95 g/cm3 | ≥25 MPa | ≥550% |
Parameters | Tangential breaking strength (crossbar) | Permeability coefficient of water vapor | Oxidation induction time in 200 °C | – |
HDPE geomembrane | ≥110 N/mm | <1.0 × 10−16 m/s | ≥20 min | – |
2.1.2. Landfill Leachate
Chemical components | pH | COD | BOD | TOC | Cl− | Na+ | NH4–N | Pb2+ | Cd2+ |
---|---|---|---|---|---|---|---|---|---|
Contents | 8.56 | 21562 | 871.2 | 9032 | 2708 | 852 | 746.8 | 0.17 | 0.107 |
Chemical components | Cu | Fe | Zn | Phenol | Ca2+ | K+ | Mg2+ | Hardness(CaCO3) | SO42− |
Contents | 0.11 | 7.26 | 0.48 | 0.1117 | 2072 | 794 | 1537 | 3401 | 385 |
2.2. Test Methods
Test conditions | Tensile test at longitudinal grain direction, z | Tensile test at cross grain direction, h | Puncture test | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Corrosion time, t (days) | Corrosion time, t (days) | Corrosion time, t (days) | ||||||||
5 | 10 | 15 | 5 | 10 | 15 | 5 | 10 | 15 | ||
Temperature, T | 20 °C | z-20-5 | z-20-10 | z-20-15 | h-20-5 | h-20-10 | h-20-15 | 20-5 | 20-10 | 20-15 |
50 °C | z-50-5 | z-50-10 | z-50-15 | h-50-5 | h-50-10 | h-50-15 | 50-5 | 50-10 | 50-15 | |
80 °C | z-80-5 | z-80-10 | z-80-15 | h-80-5 | h-80-10 | h-80-15 | 80-5 | 80-10 | 80-15 |
3. Results and Analysis
3.1. The Tension and Puncture Properties of Intact Geomembrane Specimens
3.2. Impact of Corrosion Time on the Tensile Strength Properties of Geomembrane Specimens
3.3. Impact of Corrosion Temperature on the Tensile Strength Properties of Geomembrane Specimens
3.4. The Puncture Strength Properties of Geomembrane Specimens Corroded with Leachate
3.5. The Strength/Elongation/Deformation Variations of HDPE Geomembrane Specimens
Project | Longitudinal grain direction | Cross grain direction | |||||
---|---|---|---|---|---|---|---|
5 days | 10 days | 15 days | 5 days | 10 days | 15 days | ||
Tensile strength variations/kN | 20 °C | 0.004 | 0.036 | 0.095 | 0.012 | 0.039 | 0.088 |
50 °C | 0.149 | 0.302 | 0.497 | 0.137 | 0.284 | 0.473 | |
80 °C | 0.260 | 0.438 | 0.759 | 0.220 | 0.336 | 0.641 | |
Residual strength variations/kN | 20 °C | −0.019 | −0.001 | 0.009 | −0.06 | 0.003 | −0.002 |
50 °C | 0.037 | 0.148 | 0.243 | 0.055 | 0.184 | 0.324 | |
80 °C | 0.166 | 0.254 | 0.530 | 0.124 | 0.180 | 0.486 | |
Elongation variations/% | 20 °C | 0.6 | 0.4 | 0.6 | 0.1 | 0.9 | 1.3 |
50 °C | 0.9 | 1.3 | 1.6 | 1.4 | 2.1 | 2.5 | |
80 °C | 1 | 0.7 | 0.3 | 1.3 | 0.9 | 0.5 | |
Project | Puncture strength variations/kN | Puncture deformation variations/mm | |||||
5 days | 10 days | 15 days | 5 days | 10 days | 15 days | ||
Puncture test | 20 °C | 0.004 | 0.026 | 0.054 | 0.1 | 0.6 | 1.8 |
50 °C | 0.051 | 0.097 | 0.148 | 2.8 | 4.3 | 5.5 | |
80 °C | 0.305 | 0.359 | 0.420 | 7.0 | 8.7 | 11.2 |
4. Conclusions
Acknowledgments
Conflicts of Interest
References
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Xue, Q.; Zhang, Q.; Li, Z.-Z.; Xiao, K. The Tension and Puncture Properties of HDPE Geomembrane under the Corrosion of Leachate. Materials 2013, 6, 4109-4121. https://doi.org/10.3390/ma6094109
Xue Q, Zhang Q, Li Z-Z, Xiao K. The Tension and Puncture Properties of HDPE Geomembrane under the Corrosion of Leachate. Materials. 2013; 6(9):4109-4121. https://doi.org/10.3390/ma6094109
Chicago/Turabian StyleXue, Qiang, Qian Zhang, Zhen-Ze Li, and Kai Xiao. 2013. "The Tension and Puncture Properties of HDPE Geomembrane under the Corrosion of Leachate" Materials 6, no. 9: 4109-4121. https://doi.org/10.3390/ma6094109